United States · 1991–2020

Best time to visit
Vallonia.

September leads for comfortable weather in Vallonia: typically 25.5°C by day, 12°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.5°C

Typical low12°C

Rain in September89 mm

Comfort

September

September · May · June

79climate match

Beach

July

July · August · June

72climate match

Outdoors

October

October · September · April

77climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 3.2°C, 21° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

53.2° / -5.8°

Feb

55.7° / -4.5°

Mar

1811.9° / -0.2°

Apr

4318.3° / 5.3°

May

6923.4° / 11.2°

Jun

6927.7° / 16.1°

Jul

6229.5° / 17.9°

Aug

6629.2° / 16.6°

Sep

7925.5° / 12°

Oct

5719.4° / 5.4°

Nov

2212.1° / 0.6°

Dec

55.3° / -3.6°

Monthly climate evidence for Vallonia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.2°C	-5.8°C	94 mm	8.4	9 h 43	5	Good coverage
February	5.7°C	-4.5°C	70 mm	7.1	10 h 41	5	Good coverage
March	11.9°C	-0.2°C	102 mm	9.1	11 h 50	18	Good coverage
April	18.3°C	5.3°C	137 mm	10.6	13 h 10	43	Good coverage
May	23.4°C	11.2°C	142 mm	11	14 h 16	69	Good coverage
June	27.7°C	16.1°C	120 mm	8.4	14 h 52	69	Good coverage
July	29.5°C	17.9°C	107 mm	8	14 h 38	62	Good coverage
August	29.2°C	16.6°C	116 mm	5.9	13 h 41	66	Good coverage
September	25.5°C	12°C	89 mm	6.7	12 h 24	79	Good coverage
October	19.4°C	5.4°C	89 mm	6	11 h 07	57	Good coverage
November	12.1°C	0.6°C	98 mm	7.4	10 h	22	Good coverage
December	5.3°C	-3.6°C	97 mm	8.7	9 h 27	5	Good coverage

Records at SEYMOUR 1 WSW, 1893–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C24 Jan 1943	-30.6°C18 Jan 1977	95 mm4 Jan 2000	386 mm1937 · driest 7 mm in 1943	120
February	26.7°C8 Feb 1937	-29.4°C2 Feb 1951	71 mm25 Feb 1929	176 mm1909 · driest 0 mm in 1919	119
March	31.1°C24 Mar 1929	-23.3°C3 Mar 1980	152 mm4 Mar 1897	329 mm1897 · driest 4 mm in 1910	122
April	35.0°C30 Apr 1942	-12.8°C7 Apr 1982	147 mm16 Apr 1998	308 mm1998 · driest 6 mm in 1896	121
May	38.3°C28 May 1911	-2.8°C1 May 1963	108 mm24 May 1968	292 mm1968 · driest 12 mm in 1934	122
June	43.9°C29 Jun 1936	1.7°C3 Jun 1910	94 mm23 Jun 1960	222 mm1941 · driest 5 mm in 1933	122
July	45.0°C13 Jul 1936	5.0°C13 Jul 2002	102 mm19 Jul 1971	279 mm1958 · driest 0 mm in 2022	123
August	43.9°C22 Aug 1936	4.4°C25 Aug 1951	104 mm28 Aug 2006	216 mm2006 · driest 0 mm in 2022	121
September	41.1°C3 Sep 1953	-3.9°C26 Sep 1928	114 mm30 Sep 1893	210 mm1911 · driest 0 mm in 2022	123
October	35.0°C1 Oct 1953	-9.4°C25 Oct 1981	140 mm21 Oct 1983	313 mm1983 · driest 2 mm in 1908	121
November	30.6°C12 Nov 1924	-18.9°C30 Nov 1958	80 mm15 Nov 1993	234 mm1985 · driest 0 mm in 2012	121
December	23.9°C3 Dec 1982	-30.0°C22 Dec 1989	66 mm17 Dec 2001	182 mm1990 · driest 16 mm in 1947	120

Typical days per month at SEYMOUR 1 WSW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	2
February	0	0	23	3	2
March	2	0	18	3	1
April	5	<1	5	4	0
May	14	3	<1	5	0
June	24	11	0	4	0
July	29	16	0	3	0
August	28	14	0	3	0
September	17	6	<1	3	0
October	6	<1	5	3	<1
November	<1	0	16	3	<1
December	0	0	23	3	1

How often, not how much — every day in SEYMOUR 1 WSW’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	<1%	28%	10%	29%	0.4–8.8°C
February	1%	27%	9%	28%	2.4–9.8°C
March	11%	31%	12%	35%	8.3–16.3°C
April	30%	32%	12%	39%	16.1–21.3°C
May	56%	32%	13%	40%	21.5–27.1°C
June	69%	29%	12%	32%	26.4–31.2°C
July	74%	26%	11%	26%	28.9–33.5°C
August	77%	23%	10%	20%	28.0–32.7°C
September	73%	22%	10%	18%	24.2–29.7°C
October	47%	21%	9%	20%	17.3–23.4°C
November	11%	27%	11%	29%	9.3–15.5°C
December	<1%	28%	11%	31%	2.5–9.5°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1894Each stripe is one year’s mean temperature against the 111-year average. Warmest: 1921. Coolest: 1978.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4266207
NOAA station: USC00127935 · SEYMOUR 1 WSW
Station distance: 20.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 38.85°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from SEYMOUR 1 WSW is what differs

Seymour→Brownstown→Freetown→Jonesville→Acme→Bald Knobs→

Or put two places side by side: Vallonia vs Seymour

Best time to visitVallonia.